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| 1 | Group VB transition metal dichalcogenides for oxygen reduction reaction and strain-enhanced activity governed by p-orbital electrons of chalcogen显示文摘Developi ng alter native oxyge n reducti on reactio n (ORR) catalysts to replace precious Pt-based metals with abundant materials is the key challe nge of commercial application of fuel cells. Owing to their various compositi ons and tun able electronic properties, transition metal dichalcogenides (TMDs) have the great potential to realize high-efficiency catalysts for ORR. Here, various 3R-phase dichalcogenides of group VB and VIB transition metals (MX2, M = Nb, Ta, Mo, W;X = S, Se, Te) are investigated for ORR catalysts by using density functional theory calculations. The computed over-potentials of group VB TMDs are much less than those of group VIB TMDs. For group VB TMDs, a volcano-type plot of ORR catalytic activity is established on the adsorption energies of *OH, and NbS2 and TaTe2 exhibit best ORR activity with an oveepotential of 0.54 V. To achieve even better activity, strain engineering is performed to tune ORR catalytic activity, and the minimum over-potential of 0.43 V can be realized. We further dem on strate that the shift of p orbital center of surface chalcoge n elements under strain is responsible for tuning the catalytic activity of TMDs. | Shuyang Zhao Ke Wang Xiaolong Zou Lin Gan Hongda Du Chengjun Xu Feiyu Kang Wenhui Duan Jia Li | 2019 | Nano Research2019，12，4： | 4 |
| 2 | Advances in Understanding Materials for Rechargeable Lithium Batteries by Atomic Force Microscopy显示文摘The development of advanced lithium batteries represents a major technological challenge for the new century.Understanding the fundamental electrode degradation mechanisms is important for battery performance improvements.The complex electrochemical processes inside a working battery are being explored to a limited extent.Various advanced material characterization techniques have been used to monitor dynamic conditions for optimizing battery materials.State-of-the-art atomic force microscopy methods have been applied to energy storage systems,specifically lithium-ion batteries.Atomic force microscopy is an ideal tool to provide localized morphological,chemical,and physical information at nanoscale for the in-depth understanding of the electrochemical processes,reaction mechanisms,and degradation of battery materials.Here,we review recent progress in the development and application of atomic force microscopy for high-performance lithium-ion batteries.We discuss atomic force microscopy as an analytical tool to help researchers understand graphite,silicon,layered metal oxides,and other representative electrode materials.We summarize the importance of atomic force microscopy technique in studying the next-generation Li–S and Li–O 2 batteries.We also highlight some of the remaining challenges and possible solutions for future development. | Shuwei Wang Qi Liu Chenglong Zhao Fengzheng Lv Xianying Qin Hongda Du Feiyu Kang Baohua Li | 2018 | Energy & Environmental Materials2018，1，1： | 4 |
| 3 | Comparative yield and efficiency of strategies based on risk assessment and fecal immunochemical test in colorectal cancer screening:A cross-sectional population-based analysis显示文摘Objective:Integration of risk stratification into fecal immunochemical test(FIT)might aid in the suboptimal detection of advanced neoplasms by FIT in colorectal cancer(CRC)screening.A comparative study was conducted to evaluate the participation and diagnostic yield of the parallel combination of questionnaire-based risk assessment(QRA)and FIT,FIT-only and QRA-only strategies in a CRC screening program in China.Methods:The study included 29,626 individuals aged 40-74 years and invited to participate in a CRC screening program in China.Participants were first invited to undertake QRA and one-time FIT(OC-sensor).Participants with positive QRA or FIT were deemed to be high-risk individuals who were recommended for subsequent colonoscopy.Participation,detection rate,and resource demand for colonoscopy were calculated and compared.Results:Of the 29,626 invitees,20,203 completed the parallel combination,8,592 completed the QRA-only,and11 completed the FIT-only strategy.For the parallel combination,FIT-only,and QRA-only strategies,the overall positivity rates were 10.2%(2,928/28,806),5.4%(1,096/20,214),and 6.8%(1,944/28,795),respectively;the yield of advanced neoplasm per 10,000 invitees were 46.9[95%confidence interval(95%CI):39.8-55.4],36.8(95%CI:30.5-44.4),and 12.2(95%CI:8.8-16.8),respectively;the positive predictive values for detecting advanced neoplasms among participants who completed colonoscopy were 4.7%(95%CI:4.0%-5.6%),9.9%(95%CI:8.3%-11.9%),and 1.9%(95%CI:1.3%-2.6%),respectively;the number of colonoscopies required to detect one advanced neoplasm was 11.4(95%CI:9.8-13.4),5.7(95%CI:4.8-6.7),and 28.4(95%CI:20.7-39.2),respectively.Conclusions:The parallel combination of QRA and FIT did not show superior efficacy for detecting advanced neoplasm compared with FIT alone in this CRC screening program. | Hongda Chen Le Wang Ming Lu Chen Zhu Yunfeng Zhu Weihua Ma Xinmin Chen Lingbin Du Wanqing Chen | 2021 | Chinese Journal of Cancer Research2021，33，4： | 3 |
| 4 | Electrochemical properties of nanosized hydrous manganese dioxide synthesized by a self-reacting microemulsion method显示文摘 | Chengjun Xu Baohua Li Hongda Du Feiyu Kang Yuqun Zeng | 2008 | Journal of Power Sources2008，，： | 2 |
| 5 | Effects of inherent potassium on the catalytic performance of Ni/biochar for steam reforming of toluene as a tar model compound显示文摘Biochar supported nickel(Ni/BC)has been widely studied as a cheap and easy-to-prepare catalyst with potential applications in tar reforming during the gasification of low-rank fuels,such as brown coal and biomass.However,the role and behaviors of inherent K species,especially their interactions with Ni particles and the biochar support,are not well understood yet.In this work,three Ni/BC catalysts with varying K amount were prepared from raw,water-washed,and acid-washed biomass.They were used in steam reforming of toluene as a tar model compound to elucidate the effects of inherent K on the catalytic activity and stability.Detailed characterization indicated that K enhanced water adsorption due to its hydroscopicity and lowered the condensation and graphitization degrees of biochar,but the alteration to the electronic state of Ni was not observed.These effects together led to a temperature-dependent role of K.That is,at relatively low temperatures of 450 and 500℃,toluene conversion was increased in the presence of K,due to the increased concentration of adsorbed water around Ni particles.By contrast,at relatively higher temperatures of 550 and 600℃,although initial high activity was achieved,Ni/BC with K deactivated rapidly because of the accelerated consumption of the biochar support. | Chen Xu Zhenyi Du Shiqi Yang Hongda Ma Jie Feng | 2021 | Chinese Journal of Chemical Engineering2021，34，7： | 2 |
| 6 | Flexible supercapacitors显示文摘Flexible supercapacitors show a great potential for applications in wearable,miniaturized,portable,largescale transparent and flexible consumer electronics due to their significant,inherent advantages,such as being flexible,lightweight,low cost and environmentally friendly in comparison with the current energy storage devices.In this report,recent progress on flexible supercapacitors,flexible electrodes and electrolytes is reviewed.In addition,the future challenges and opportunities are discussed. | Shan Shi Chengjun Xu Cheng Yang Jia Li Hongda Du Baohua Li Feiyu Kang | 2013 | Particuology2013，11，4： | 2 |
| 7 | Tailoring native defects and zinc impurities in Li4 Ti5 ()12 Insights from firs-principles study 显示文摘 | DUAN Huan LI Jia DU Hongda | 2015 | Journal of Physical Chemistry C2015，119，9： | 1 |
| 8 | Highly dispersed Pt nanoparticles by pentagon defects introduced in bambooshaped carbon nanotube support and their enhanced catalytic activity on methanol oxidation显示文摘 | Gan Lin Lv R Du Hongda | 2009 | Carbon2009，47，7： | 1 |
| 9 | Porous graphitic carbons prepared by combining chemical activation with catalytic graphitization显示文摘 | Dengyun Zhai Hongda Du Baohua Li Yuan Zhu Feiyu Kang | 2010 | Carbon2010，，2： | 1 |
| 10 | Geology and development of geothermal field in Neogene Guantao Formation in northern Bohai Bay Basin: A case of the Caofeidian geothermal heating project in Tangshan, China显示文摘Taking the Gaoshangpu-Liuzan geothermal field in the Nanpu sag of the Bohai Bay Basin as the research object, this paper discusses the geological conditions and potential of the geothermal resources of the Guantao Formation in the study area, and introduces the development practice of geothermal energy heating in Caofeidian. The average buried depth of the Guantao Formation is 1500–2500 m, the lithology is dominated by sandy conglomerate, and the average thickness of thermal reservoir is 120–300 m. The average porosity of thermal reservoir is 28%–35%, the permeability is(600–2000)×10^(-3) μm^(2), and the temperature of thermal reservoir is 70–110 ℃. The formation has total geothermal resources of 13.79×10^(18) J, equivalent to 4.70×10^(8) t of standard coal. Based on a large amount of seismic and drilling data from oil and gas exploration, this study carried out high quality target area selection, simulation of sandstone thermal reservoir, and production and injection in the same layer. The geothermal heating project with distributed production and injection well pattern covering an area of 230×10^(4) m^(2) was completed in the new district of Caofeidian in 2018. The project has been running steadily for two heating seasons, with an average annual saving of 6.06×10^(4) t of standard coal and a reduction of 15.87×10^(4) t of carbon dioxide, achieving good economic and social benefits. This project has proved that the Neogene sandstone geothermal reservoir in eastern China can achieve sustainable large-scale development by using the technology of 'balanced production and injection in the same layer'. It provides effective reference for the exploration and development of geothermal resource in oil and gas-bearing basins in eastern China. | DONG Yuexia HUANG Hongxiang REN Lu LI Hongda DU Zhiqiang E Junjie WANG Qi ZHANG Xiaoming | 2021 | Petroleum Exploration and Development2021，48，3： | 1 |
| 11 | Experiments and modeling of thermal conductivity of flake graphite/ polymer composites affected by adding carbon-based nano-fillers 显示文摘 | Shaoxin Zhou Jinzao Xu Hongda Du | 2013 | Carbon2013，57，： | 1 |
| 12 | Prediction of interfacial thermal resistance of carbon fiber in one di- mensional fiber-reinforced composites using laser flash analysis 显示文摘 | Niu Hu Hongda Du Sum Wai Chiang | 2015 | Composites Science and Techndogy2015，110，： | 1 |
| 13 | Electrochemical properties of nanosized hydrous manganese dioxide synthesized by a self-reacting microemulsion method显示文摘 | Chengjun Xu Baohua Li Hongda Du Feiyu Kang Yuqun Zeng | 2008 | Journal of Power Sources2008，，1： | 1 |
| 14 | Energetic zinc ion chemistry: the rechargeable zinc ion battery显示文摘 | Xu Chengjun Li Baohua Du Hongda | 2012 | Angewandte Chemie2012，124，4： | 1 |
| 15 | Environment-friendly preparation of exfoliated graphite and functional graphite sheets显示文摘Exfoliated graphite(EG)is promising oil sorbent as well as an intermediate product for the preparation of flexible graphite films(FGFs).It has been a critical challenge to energy conservation and pollution abatement for the traditional EG production technique.Here,we propose a simple and effective preparation method to acquire EG in which flake graphite is intercalated and exfoliated at room temperature,not involving any pollutant emission.The influence factors in the preparation process were explored,such as the amount of H_(2)SO_(4)and H_(2)O_(2),the temperature for the preparation of room temperature exfoliated graphite(RTEG).In contrast to the EG by high temperature exfoliation(HTEG),RTEG exhibits a homogeneous structure and a significantly increased volume and surface area.Moreover,EG blocks with high oil sorption capacity and excellent reuse performance can be obtained by RTEG method.Especially,FGFs fabricated by RTEG has high flexibility,thermal conductivity and electrical conductivity.It suggests that this environment-friendly technology is suitable for large-scale industrial implementation of graphite-based oil sorbents and flexible materials. | Shiyu Hou Shuaijie He Tianle Zhu Jihui Li Liqiang Ma Hongda Du Wanci Shen Feiyu Kang Zheng-Hong Huang | 2021 | Journal of Materiomics2021，7，1： | 0 |
| 16 | Photonic crystal vertical-cavity surface-emitting laserbased on GaAs material显示文摘A photonic crystal vertical-cavity-surface-emitting laser (PC-VCSEL) with a wavelength of about 850 nm was realized. The direct-current electrically-driven PC-VCSELs with a minimum threshold current of 2 mA and a maximum threshold current of 13.5 mA were obtained. We fabricated a series of PC-VCSEL chips whose lattice constants are in the range from 0.5 to 3 μm with different filling factors, and found that the laser characterization depends on the lattice constant, the filling factor, the size of cavity, etc. | XU XingSheng WANG ChunXia SONG Qian DU Wei HU HaiYang ZHAO ZhiMin LU Lin KAN Qiang CHEN HongDa | 2007 | Chinese Science Bulletin2007，52，18： | 0 |
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